haha..nice...its hard though i would imagine to keep the flow moving in terms of only asking leading questions...and is there any moment when it would be appropriate to ask a witness on cross an open ending question?

voir dire is very very important. more important than you think. if you get a weird vibe from someone, even if they're giving all the right answers, get rid of them. figure out what your model juror is like and what your worst juror is like. fight for the former and get rid of the latter.

your credibility is the next most important thing. jury is, most likely, not the brightest folks and lack the capacity to draw correct logical conclusions, so it will be your job to do it for them, and you need them to believe you and not the other guy. eye contact; clear and concise, but not too dumbed down, language; straightforward, easy-to-follow conclusions; sincere passion - these help you make that connection.

jurys often decide first if they think the defendant is guilty or not based on a hunch, and then based on that decision back into conclusions about the credibility of witnesses, sufficiency of evidence, etc. you want them on your side before you even get to the evidence. once they've decided whose side they're on, it's very difficult to win them back.